Algebra
posted by mychelle on .
How many possible 9digit zip codes are possible if the first digit cannot be zero?

8*9^8

90,000

900,000,000 aka 9*10^8
posted by mychelle on .
How many possible 9digit zip codes are possible if the first digit cannot be zero?
8*9^8
90,000
900,000,000 aka 9*10^8